I had to remove a swarm from an attic and could only get around 40% of the bees into my box. The remainder went and re formed in an inaccessible void but as i left them for around 30 mins after getting the first batch in the box only a few of the remaining bees joined them in the box. Therefore I assume that I didn't get her as have collected swarms before so know how they react when you get the queen.